I make apps for iOS and I would like to add my two cents.
yb613 – any app with a built in browser must be rated 17+ as per the App Store guidelnes. Report apps to Apple that are not properly rated. As I said, I make apps. I would know.
Leon Normanson – The TV is merely a scapegoat for poor parenting. Children who are shown proper love and care don’t need a TV to babysit them.
Guy-ocho – I’m not sure if you are not a native English speaker, or your a bluffing, but “Operating platforms” is completely the wrong word here. Try “languages” or “runtimes”. As far as removing the card and/jailbreaking, I would not do that. A jail broken device is much more likely to make the filters removable and doing either of those things voids your warranty.
The best solution as was mentioned, is to supervise and attach the device to your password protected iTunes account. I have actually restricted myself once on my iPod and forgot the password. I had to reset it. I have not tried updating the firmware. Again, just be vigilant with keeping up track of what’s going on.
Good luck!